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/*************************************************************************** |
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* * |
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* LinuxSampler - modular, streaming capable sampler * |
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* * |
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* Copyright (C) 2003, 2004 by Benno Senoner and Christian Schoenebeck * |
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* * |
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* This program is free software; you can redistribute it and/or modify * |
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* it under the terms of the GNU General Public License as published by * |
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* the Free Software Foundation; either version 2 of the License, or * |
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* (at your option) any later version. * |
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* * |
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* This program is distributed in the hope that it will be useful, * |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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* GNU General Public License for more details. * |
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* * |
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* You should have received a copy of the GNU General Public License * |
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* along with this program; if not, write to the Free Software * |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, * |
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* MA 02111-1307 USA * |
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***************************************************************************/ |
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|
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#include <sstream> |
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#include "DiskThread.h" |
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#include "Voice.h" |
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#include "EGADSR.h" |
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|
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#include "Engine.h" |
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#include <malloc.h> |
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|
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namespace LinuxSampler { namespace gig { |
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|
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InstrumentResourceManager Engine::Instruments; |
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|
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Engine::Engine() { |
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pRIFF = NULL; |
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pGig = NULL; |
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pInstrument = NULL; |
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pAudioOutputDevice = NULL; |
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pDiskThread = NULL; |
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pEventGenerator = NULL; |
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pSysexBuffer = new RingBuffer<uint8_t>(SYSEX_BUFFER_SIZE, 0); |
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pEventQueue = new RingBuffer<Event>(MAX_EVENTS_PER_FRAGMENT, 0); |
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pEventPool = new Pool<Event>(MAX_EVENTS_PER_FRAGMENT); |
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pVoicePool = new Pool<Voice>(MAX_AUDIO_VOICES); |
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pActiveKeys = new Pool<uint>(128); |
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pVoiceStealingQueue = new RTList<Event>(pEventPool); |
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pEvents = new RTList<Event>(pEventPool); |
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pCCEvents = new RTList<Event>(pEventPool); |
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for (uint i = 0; i < Event::destination_count; i++) { |
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pSynthesisEvents[i] = new RTList<Event>(pEventPool); |
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} |
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for (uint i = 0; i < 128; i++) { |
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pMIDIKeyInfo[i].pActiveVoices = new RTList<Voice>(pVoicePool); |
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pMIDIKeyInfo[i].KeyPressed = false; |
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pMIDIKeyInfo[i].Active = false; |
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pMIDIKeyInfo[i].ReleaseTrigger = false; |
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pMIDIKeyInfo[i].pEvents = new RTList<Event>(pEventPool); |
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} |
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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iterVoice->SetEngine(this); |
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} |
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pVoicePool->clear(); |
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|
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pSynthesisParameters[0] = NULL; // we allocate when an audio device is connected |
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pBasicFilterParameters = NULL; |
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pMainFilterParameters = NULL; |
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|
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InstrumentIdx = -1; |
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InstrumentStat = -1; |
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|
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AudioDeviceChannelLeft = -1; |
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AudioDeviceChannelRight = -1; |
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|
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ResetInternal(); |
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} |
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|
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Engine::~Engine() { |
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if (pDiskThread) { |
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dmsg(1,("Stopping disk thread...")); |
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pDiskThread->StopThread(); |
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delete pDiskThread; |
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dmsg(1,("OK\n")); |
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} |
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|
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if (pInstrument) Instruments.HandBack(pInstrument, this); |
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|
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if (pGig) delete pGig; |
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if (pRIFF) delete pRIFF; |
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for (uint i = 0; i < 128; i++) { |
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if (pMIDIKeyInfo[i].pActiveVoices) delete pMIDIKeyInfo[i].pActiveVoices; |
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if (pMIDIKeyInfo[i].pEvents) delete pMIDIKeyInfo[i].pEvents; |
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} |
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for (uint i = 0; i < Event::destination_count; i++) { |
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if (pSynthesisEvents[i]) delete pSynthesisEvents[i]; |
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} |
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if (pEvents) delete pEvents; |
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if (pCCEvents) delete pCCEvents; |
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if (pEventQueue) delete pEventQueue; |
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if (pEventPool) delete pEventPool; |
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if (pVoicePool) { |
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pVoicePool->clear(); |
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delete pVoicePool; |
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} |
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if (pActiveKeys) delete pActiveKeys; |
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if (pSysexBuffer) delete pSysexBuffer; |
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if (pEventGenerator) delete pEventGenerator; |
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if (pMainFilterParameters) delete[] pMainFilterParameters; |
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if (pBasicFilterParameters) delete[] pBasicFilterParameters; |
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if (pSynthesisParameters[0]) free(pSynthesisParameters[0]); |
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if (pVoiceStealingQueue) delete pVoiceStealingQueue; |
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} |
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|
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void Engine::Enable() { |
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dmsg(3,("gig::Engine: enabling\n")); |
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EngineDisabled.PushAndUnlock(false, 2); // set condition object 'EngineDisabled' to false (wait max. 2s) |
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dmsg(3,("gig::Engine: enabled (val=%d)\n", EngineDisabled.GetUnsafe())); |
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} |
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|
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void Engine::Disable() { |
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dmsg(3,("gig::Engine: disabling\n")); |
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bool* pWasDisabled = EngineDisabled.PushAndUnlock(true, 2); // wait max. 2s |
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if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n")); |
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} |
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|
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void Engine::DisableAndLock() { |
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dmsg(3,("gig::Engine: disabling\n")); |
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bool* pWasDisabled = EngineDisabled.Push(true, 2); // wait max. 2s |
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if (!pWasDisabled) dmsg(3,("gig::Engine warning: Timeout waiting to disable engine.\n")); |
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} |
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|
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/** |
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* Reset all voices and disk thread and clear input event queue and all |
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* control and status variables. |
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*/ |
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void Engine::Reset() { |
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DisableAndLock(); |
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|
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//if (pAudioOutputDevice->IsPlaying()) { // if already running |
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/* |
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// signal audio thread not to enter render part anymore |
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SuspensionRequested = true; |
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// sleep until wakened by audio thread |
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pthread_mutex_lock(&__render_state_mutex); |
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pthread_cond_wait(&__render_exit_condition, &__render_state_mutex); |
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pthread_mutex_unlock(&__render_state_mutex); |
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*/ |
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//} |
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|
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//if (wasplaying) pAudioOutputDevice->Stop(); |
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|
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ResetInternal(); |
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|
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// signal audio thread to continue with rendering |
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//SuspensionRequested = false; |
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Enable(); |
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} |
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|
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/** |
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* Reset all voices and disk thread and clear input event queue and all |
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* control and status variables. This method is not thread safe! |
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*/ |
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void Engine::ResetInternal() { |
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Pitch = 0; |
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SustainPedal = false; |
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ActiveVoiceCount = 0; |
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ActiveVoiceCountMax = 0; |
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GlobalVolume = 1.0; |
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CurrentKeyDimension = 0; |
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|
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// reset voice stealing parameters |
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itLastStolenVoice = RTList<Voice>::Iterator(); |
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iuiLastStolenKey = RTList<uint>::Iterator(); |
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pVoiceStealingQueue->clear(); |
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|
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// reset to normal chromatic scale (means equal temper) |
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memset(&ScaleTuning[0], 0x00, 12); |
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|
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// set all MIDI controller values to zero |
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memset(ControllerTable, 0x00, 128); |
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|
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// reset key info |
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for (uint i = 0; i < 128; i++) { |
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pMIDIKeyInfo[i].pActiveVoices->clear(); |
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pMIDIKeyInfo[i].pEvents->clear(); |
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pMIDIKeyInfo[i].KeyPressed = false; |
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pMIDIKeyInfo[i].Active = false; |
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pMIDIKeyInfo[i].ReleaseTrigger = false; |
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pMIDIKeyInfo[i].itSelf = Pool<uint>::Iterator(); |
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} |
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|
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// reset all key groups |
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map<uint,uint*>::iterator iter = ActiveKeyGroups.begin(); |
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for (; iter != ActiveKeyGroups.end(); iter++) iter->second = NULL; |
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|
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// reset all voices |
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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iterVoice->Reset(); |
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} |
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pVoicePool->clear(); |
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|
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// free all active keys |
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pActiveKeys->clear(); |
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|
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// reset disk thread |
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if (pDiskThread) pDiskThread->Reset(); |
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|
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// delete all input events |
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pEventQueue->init(); |
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} |
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|
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/** |
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* Load an instrument from a .gig file. |
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* |
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* @param FileName - file name of the Gigasampler instrument file |
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* @param Instrument - index of the instrument in the .gig file |
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* @throws LinuxSamplerException on error |
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* @returns detailed description of the method call result |
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*/ |
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void Engine::LoadInstrument(const char* FileName, uint Instrument) { |
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|
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DisableAndLock(); |
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|
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ResetInternal(); // reset engine |
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|
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// free old instrument |
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if (pInstrument) { |
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// give old instrument back to instrument manager |
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Instruments.HandBack(pInstrument, this); |
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} |
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|
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InstrumentFile = FileName; |
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InstrumentIdx = Instrument; |
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InstrumentStat = 0; |
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|
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// delete all key groups |
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ActiveKeyGroups.clear(); |
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|
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// request gig instrument from instrument manager |
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try { |
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instrument_id_t instrid; |
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instrid.FileName = FileName; |
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instrid.iInstrument = Instrument; |
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pInstrument = Instruments.Borrow(instrid, this); |
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if (!pInstrument) { |
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InstrumentStat = -1; |
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dmsg(1,("no instrument loaded!!!\n")); |
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exit(EXIT_FAILURE); |
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} |
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} |
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catch (RIFF::Exception e) { |
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InstrumentStat = -2; |
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String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message; |
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throw LinuxSamplerException(msg); |
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} |
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catch (InstrumentResourceManagerException e) { |
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InstrumentStat = -3; |
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String msg = "gig::Engine error: Failed to load instrument, cause: " + e.Message(); |
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throw LinuxSamplerException(msg); |
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} |
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catch (...) { |
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InstrumentStat = -4; |
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throw LinuxSamplerException("gig::Engine error: Failed to load instrument, cause: Unknown exception while trying to parse gig file."); |
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} |
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|
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// rebuild ActiveKeyGroups map with key groups of current instrument |
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for (::gig::Region* pRegion = pInstrument->GetFirstRegion(); pRegion; pRegion = pInstrument->GetNextRegion()) |
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if (pRegion->KeyGroup) ActiveKeyGroups[pRegion->KeyGroup] = NULL; |
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|
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InstrumentStat = 100; |
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|
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// inform audio driver for the need of two channels |
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try { |
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if (pAudioOutputDevice) pAudioOutputDevice->AcquireChannels(2); // gig Engine only stereo |
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} |
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catch (AudioOutputException e) { |
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String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message(); |
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throw LinuxSamplerException(msg); |
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} |
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|
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Enable(); |
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} |
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|
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/** |
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* Will be called by the InstrumentResourceManager when the instrument |
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* we are currently using in this engine is going to be updated, so we |
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* can stop playback before that happens. |
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*/ |
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void Engine::ResourceToBeUpdated(::gig::Instrument* pResource, void*& pUpdateArg) { |
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dmsg(3,("gig::Engine: Received instrument update message.\n")); |
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DisableAndLock(); |
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ResetInternal(); |
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this->pInstrument = NULL; |
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} |
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|
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/** |
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* Will be called by the InstrumentResourceManager when the instrument |
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* update process was completed, so we can continue with playback. |
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*/ |
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void Engine::ResourceUpdated(::gig::Instrument* pOldResource, ::gig::Instrument* pNewResource, void* pUpdateArg) { |
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this->pInstrument = pNewResource; //TODO: there are couple of engine parameters we should update here as well if the instrument was updated (see LoadInstrument()) |
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Enable(); |
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} |
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|
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void Engine::Connect(AudioOutputDevice* pAudioOut) { |
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pAudioOutputDevice = pAudioOut; |
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|
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ResetInternal(); |
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|
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// inform audio driver for the need of two channels |
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try { |
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pAudioOutputDevice->AcquireChannels(2); // gig engine only stereo |
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} |
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catch (AudioOutputException e) { |
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String msg = "Audio output device unable to provide 2 audio channels, cause: " + e.Message(); |
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throw LinuxSamplerException(msg); |
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} |
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|
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this->AudioDeviceChannelLeft = 0; |
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this->AudioDeviceChannelRight = 1; |
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this->pOutputLeft = pAudioOutputDevice->Channel(0)->Buffer(); |
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this->pOutputRight = pAudioOutputDevice->Channel(1)->Buffer(); |
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this->MaxSamplesPerCycle = pAudioOutputDevice->MaxSamplesPerCycle(); |
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this->SampleRate = pAudioOutputDevice->SampleRate(); |
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|
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// FIXME: audio drivers with varying fragment sizes might be a problem here |
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MaxFadeOutPos = MaxSamplesPerCycle - int(double(SampleRate) * EG_MIN_RELEASE_TIME) - 1; |
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if (MaxFadeOutPos < 0) |
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throw LinuxSamplerException("EG_MIN_RELEASE_TIME in EGADSR.h to big for current audio fragment size / sampling rate!"); |
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|
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// (re)create disk thread |
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if (this->pDiskThread) { |
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dmsg(1,("Stopping disk thread...")); |
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this->pDiskThread->StopThread(); |
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delete this->pDiskThread; |
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dmsg(1,("OK\n")); |
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} |
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this->pDiskThread = new DiskThread(((pAudioOut->MaxSamplesPerCycle() << MAX_PITCH) << 1) + 6); //FIXME: assuming stereo |
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if (!pDiskThread) { |
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dmsg(0,("gig::Engine new diskthread = NULL\n")); |
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exit(EXIT_FAILURE); |
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} |
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|
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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iterVoice->pDiskThread = this->pDiskThread; |
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dmsg(3,("d")); |
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} |
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pVoicePool->clear(); |
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|
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// (re)create event generator |
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if (pEventGenerator) delete pEventGenerator; |
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pEventGenerator = new EventGenerator(pAudioOut->SampleRate()); |
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|
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// (re)allocate synthesis parameter matrix |
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if (pSynthesisParameters[0]) free(pSynthesisParameters[0]); |
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pSynthesisParameters[0] = (float *) memalign(16,(Event::destination_count * sizeof(float) * pAudioOut->MaxSamplesPerCycle())); |
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for (int dst = 1; dst < Event::destination_count; dst++) |
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pSynthesisParameters[dst] = pSynthesisParameters[dst - 1] + pAudioOut->MaxSamplesPerCycle(); |
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|
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// (re)allocate biquad filter parameter sequence |
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if (pBasicFilterParameters) delete[] pBasicFilterParameters; |
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if (pMainFilterParameters) delete[] pMainFilterParameters; |
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pBasicFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()]; |
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pMainFilterParameters = new biquad_param_t[pAudioOut->MaxSamplesPerCycle()]; |
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|
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dmsg(1,("Starting disk thread...")); |
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pDiskThread->StartThread(); |
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dmsg(1,("OK\n")); |
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|
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for (RTList<Voice>::Iterator iterVoice = pVoicePool->allocAppend(); iterVoice == pVoicePool->last(); iterVoice = pVoicePool->allocAppend()) { |
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if (!iterVoice->pDiskThread) { |
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dmsg(0,("Engine -> voice::trigger: !pDiskThread\n")); |
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exit(EXIT_FAILURE); |
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} |
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} |
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} |
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|
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void Engine::DisconnectAudioOutputDevice() { |
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if (pAudioOutputDevice) { // if clause to prevent disconnect loops |
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AudioOutputDevice* olddevice = pAudioOutputDevice; |
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pAudioOutputDevice = NULL; |
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olddevice->Disconnect(this); |
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AudioDeviceChannelLeft = -1; |
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AudioDeviceChannelRight = -1; |
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} |
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} |
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|
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/** |
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* Let this engine proceed to render the given amount of sample points. The |
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* calculated audio data of all voices of this engine will be placed into |
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* the engine's audio sum buffer which has to be copied and eventually be |
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* converted to the appropriate value range by the audio output class (e.g. |
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* AlsaIO or JackIO) right after. |
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* |
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* @param Samples - number of sample points to be rendered |
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* @returns 0 on success |
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*/ |
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int Engine::RenderAudio(uint Samples) { |
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dmsg(5,("RenderAudio(Samples=%d)\n", Samples)); |
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|
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// return if no instrument loaded or engine disabled |
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if (EngineDisabled.Pop()) { |
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dmsg(5,("gig::Engine: engine disabled (val=%d)\n",EngineDisabled.GetUnsafe())); |
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return 0; |
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} |
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if (!pInstrument) { |
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dmsg(5,("gig::Engine: no instrument loaded\n")); |
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return 0; |
409 |
} |
410 |
|
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|
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// update time of start and end of this audio fragment (as events' time stamps relate to this) |
413 |
pEventGenerator->UpdateFragmentTime(Samples); |
414 |
|
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|
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// empty the event lists for the new fragment |
417 |
pEvents->clear(); |
418 |
pCCEvents->clear(); |
419 |
for (uint i = 0; i < Event::destination_count; i++) { |
420 |
pSynthesisEvents[i]->clear(); |
421 |
} |
422 |
{ |
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RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
424 |
RTList<uint>::Iterator end = pActiveKeys->end(); |
425 |
for(; iuiKey != end; ++iuiKey) { |
426 |
pMIDIKeyInfo[*iuiKey].pEvents->clear(); // free all events on the key |
427 |
} |
428 |
} |
429 |
|
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|
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// get all events from the input event queue which belong to the current fragment |
432 |
{ |
433 |
RingBuffer<Event>::NonVolatileReader eventQueueReader = pEventQueue->get_non_volatile_reader(); |
434 |
Event* pEvent; |
435 |
while (true) { |
436 |
// get next event from input event queue |
437 |
if (!(pEvent = eventQueueReader.pop())) break; |
438 |
// if younger event reached, ignore that and all subsequent ones for now |
439 |
if (pEvent->FragmentPos() >= Samples) { |
440 |
eventQueueReader--; |
441 |
dmsg(2,("Younger Event, pos=%d ,Samples=%d!\n",pEvent->FragmentPos(),Samples)); |
442 |
pEvent->ResetFragmentPos(); |
443 |
break; |
444 |
} |
445 |
// copy event to internal event list |
446 |
if (pEvents->poolIsEmpty()) { |
447 |
dmsg(1,("Event pool emtpy!\n")); |
448 |
break; |
449 |
} |
450 |
*pEvents->allocAppend() = *pEvent; |
451 |
} |
452 |
eventQueueReader.free(); // free all copied events from input queue |
453 |
} |
454 |
|
455 |
|
456 |
// process events |
457 |
{ |
458 |
RTList<Event>::Iterator itEvent = pEvents->first(); |
459 |
RTList<Event>::Iterator end = pEvents->end(); |
460 |
for (; itEvent != end; ++itEvent) { |
461 |
switch (itEvent->Type) { |
462 |
case Event::type_note_on: |
463 |
dmsg(5,("Engine: Note on received\n")); |
464 |
ProcessNoteOn(itEvent); |
465 |
break; |
466 |
case Event::type_note_off: |
467 |
dmsg(5,("Engine: Note off received\n")); |
468 |
ProcessNoteOff(itEvent); |
469 |
break; |
470 |
case Event::type_control_change: |
471 |
dmsg(5,("Engine: MIDI CC received\n")); |
472 |
ProcessControlChange(itEvent); |
473 |
break; |
474 |
case Event::type_pitchbend: |
475 |
dmsg(5,("Engine: Pitchbend received\n")); |
476 |
ProcessPitchbend(itEvent); |
477 |
break; |
478 |
case Event::type_sysex: |
479 |
dmsg(5,("Engine: Sysex received\n")); |
480 |
ProcessSysex(itEvent); |
481 |
break; |
482 |
} |
483 |
} |
484 |
} |
485 |
|
486 |
|
487 |
int active_voices = 0; |
488 |
|
489 |
// render audio from all active voices |
490 |
{ |
491 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
492 |
RTList<uint>::Iterator end = pActiveKeys->end(); |
493 |
while (iuiKey != end) { // iterate through all active keys |
494 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
495 |
++iuiKey; |
496 |
|
497 |
RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first(); |
498 |
RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end(); |
499 |
for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key |
500 |
// now render current voice |
501 |
itVoice->Render(Samples); |
502 |
if (itVoice->IsActive()) active_voices++; // still active |
503 |
else { // voice reached end, is now inactive |
504 |
FreeVoice(itVoice); // remove voice from the list of active voices |
505 |
} |
506 |
} |
507 |
} |
508 |
} |
509 |
|
510 |
|
511 |
// now render all postponed voices from voice stealing |
512 |
{ |
513 |
RTList<Event>::Iterator itVoiceStealEvent = pVoiceStealingQueue->first(); |
514 |
RTList<Event>::Iterator end = pVoiceStealingQueue->end(); |
515 |
for (; itVoiceStealEvent != end; ++itVoiceStealEvent) { |
516 |
Pool<Voice>::Iterator itNewVoice = LaunchVoice(itVoiceStealEvent, itVoiceStealEvent->Param.Note.Layer, itVoiceStealEvent->Param.Note.ReleaseTrigger, false); |
517 |
if (itNewVoice) { |
518 |
for (; itNewVoice; itNewVoice = itNewVoice->itChildVoice) { |
519 |
itNewVoice->Render(Samples); |
520 |
if (itNewVoice->IsActive()) active_voices++; // still active |
521 |
else { // voice reached end, is now inactive |
522 |
FreeVoice(itNewVoice); // remove voice from the list of active voices |
523 |
} |
524 |
} |
525 |
} |
526 |
else dmsg(1,("gig::Engine: ERROR, voice stealing didn't work out!\n")); |
527 |
} |
528 |
} |
529 |
// reset voice stealing for the new fragment |
530 |
pVoiceStealingQueue->clear(); |
531 |
itLastStolenVoice = RTList<Voice>::Iterator(); |
532 |
iuiLastStolenKey = RTList<uint>::Iterator(); |
533 |
|
534 |
|
535 |
// free all keys which have no active voices left |
536 |
{ |
537 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
538 |
RTList<uint>::Iterator end = pActiveKeys->end(); |
539 |
while (iuiKey != end) { // iterate through all active keys |
540 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
541 |
++iuiKey; |
542 |
if (pKey->pActiveVoices->isEmpty()) FreeKey(pKey); |
543 |
#if DEVMODE |
544 |
else { // FIXME: should be removed before the final release (purpose: just a sanity check for debugging) |
545 |
RTList<Voice>::Iterator itVoice = pKey->pActiveVoices->first(); |
546 |
RTList<Voice>::Iterator itVoicesEnd = pKey->pActiveVoices->end(); |
547 |
for (; itVoice != itVoicesEnd; ++itVoice) { // iterate through all voices on this key |
548 |
if (itVoice->itKillEvent) { |
549 |
dmsg(1,("gig::Engine: ERROR, killed voice survived !!!\n")); |
550 |
} |
551 |
} |
552 |
} |
553 |
#endif // DEVMODE |
554 |
} |
555 |
} |
556 |
|
557 |
|
558 |
// write that to the disk thread class so that it can print it |
559 |
// on the console for debugging purposes |
560 |
ActiveVoiceCount = active_voices; |
561 |
if (ActiveVoiceCount > ActiveVoiceCountMax) ActiveVoiceCountMax = ActiveVoiceCount; |
562 |
|
563 |
|
564 |
return 0; |
565 |
} |
566 |
|
567 |
/** |
568 |
* Will be called by the MIDIIn Thread to let the audio thread trigger a new |
569 |
* voice for the given key. |
570 |
* |
571 |
* @param Key - MIDI key number of the triggered key |
572 |
* @param Velocity - MIDI velocity value of the triggered key |
573 |
*/ |
574 |
void Engine::SendNoteOn(uint8_t Key, uint8_t Velocity) { |
575 |
Event event = pEventGenerator->CreateEvent(); |
576 |
event.Type = Event::type_note_on; |
577 |
event.Param.Note.Key = Key; |
578 |
event.Param.Note.Velocity = Velocity; |
579 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
580 |
else dmsg(1,("Engine: Input event queue full!")); |
581 |
} |
582 |
|
583 |
/** |
584 |
* Will be called by the MIDIIn Thread to signal the audio thread to release |
585 |
* voice(s) on the given key. |
586 |
* |
587 |
* @param Key - MIDI key number of the released key |
588 |
* @param Velocity - MIDI release velocity value of the released key |
589 |
*/ |
590 |
void Engine::SendNoteOff(uint8_t Key, uint8_t Velocity) { |
591 |
Event event = pEventGenerator->CreateEvent(); |
592 |
event.Type = Event::type_note_off; |
593 |
event.Param.Note.Key = Key; |
594 |
event.Param.Note.Velocity = Velocity; |
595 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
596 |
else dmsg(1,("Engine: Input event queue full!")); |
597 |
} |
598 |
|
599 |
/** |
600 |
* Will be called by the MIDIIn Thread to signal the audio thread to change |
601 |
* the pitch value for all voices. |
602 |
* |
603 |
* @param Pitch - MIDI pitch value (-8192 ... +8191) |
604 |
*/ |
605 |
void Engine::SendPitchbend(int Pitch) { |
606 |
Event event = pEventGenerator->CreateEvent(); |
607 |
event.Type = Event::type_pitchbend; |
608 |
event.Param.Pitch.Pitch = Pitch; |
609 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
610 |
else dmsg(1,("Engine: Input event queue full!")); |
611 |
} |
612 |
|
613 |
/** |
614 |
* Will be called by the MIDIIn Thread to signal the audio thread that a |
615 |
* continuous controller value has changed. |
616 |
* |
617 |
* @param Controller - MIDI controller number of the occured control change |
618 |
* @param Value - value of the control change |
619 |
*/ |
620 |
void Engine::SendControlChange(uint8_t Controller, uint8_t Value) { |
621 |
Event event = pEventGenerator->CreateEvent(); |
622 |
event.Type = Event::type_control_change; |
623 |
event.Param.CC.Controller = Controller; |
624 |
event.Param.CC.Value = Value; |
625 |
if (this->pEventQueue->write_space() > 0) this->pEventQueue->push(&event); |
626 |
else dmsg(1,("Engine: Input event queue full!")); |
627 |
} |
628 |
|
629 |
/** |
630 |
* Will be called by the MIDI input device whenever a MIDI system |
631 |
* exclusive message has arrived. |
632 |
* |
633 |
* @param pData - pointer to sysex data |
634 |
* @param Size - lenght of sysex data (in bytes) |
635 |
*/ |
636 |
void Engine::SendSysex(void* pData, uint Size) { |
637 |
Event event = pEventGenerator->CreateEvent(); |
638 |
event.Type = Event::type_sysex; |
639 |
event.Param.Sysex.Size = Size; |
640 |
if (pEventQueue->write_space() > 0) { |
641 |
if (pSysexBuffer->write_space() >= Size) { |
642 |
// copy sysex data to input buffer |
643 |
uint toWrite = Size; |
644 |
uint8_t* pPos = (uint8_t*) pData; |
645 |
while (toWrite) { |
646 |
const uint writeNow = RTMath::Min(toWrite, pSysexBuffer->write_space_to_end()); |
647 |
pSysexBuffer->write(pPos, writeNow); |
648 |
toWrite -= writeNow; |
649 |
pPos += writeNow; |
650 |
|
651 |
} |
652 |
// finally place sysex event into input event queue |
653 |
pEventQueue->push(&event); |
654 |
} |
655 |
else dmsg(1,("Engine: Sysex message too large (%d byte) for input buffer (%d byte)!",Size,SYSEX_BUFFER_SIZE)); |
656 |
} |
657 |
else dmsg(1,("Engine: Input event queue full!")); |
658 |
} |
659 |
|
660 |
/** |
661 |
* Assigns and triggers a new voice for the respective MIDI key. |
662 |
* |
663 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
664 |
*/ |
665 |
void Engine::ProcessNoteOn(Pool<Event>::Iterator& itNoteOnEvent) { |
666 |
|
667 |
const int key = itNoteOnEvent->Param.Note.Key; |
668 |
|
669 |
// Change key dimension value if key is in keyswitching area |
670 |
if (key >= pInstrument->DimensionKeyRange.low && key <= pInstrument->DimensionKeyRange.high) |
671 |
CurrentKeyDimension = ((key - pInstrument->DimensionKeyRange.low) * 128) / |
672 |
(pInstrument->DimensionKeyRange.high - pInstrument->DimensionKeyRange.low + 1); |
673 |
|
674 |
midi_key_info_t* pKey = &pMIDIKeyInfo[key]; |
675 |
|
676 |
pKey->KeyPressed = true; // the MIDI key was now pressed down |
677 |
|
678 |
// cancel release process of voices on this key if needed |
679 |
if (pKey->Active && !SustainPedal) { |
680 |
RTList<Event>::Iterator itCancelReleaseEvent = pKey->pEvents->allocAppend(); |
681 |
if (itCancelReleaseEvent) { |
682 |
*itCancelReleaseEvent = *itNoteOnEvent; // copy event |
683 |
itCancelReleaseEvent->Type = Event::type_cancel_release; // transform event type |
684 |
} |
685 |
else dmsg(1,("Event pool emtpy!\n")); |
686 |
} |
687 |
|
688 |
// move note on event to the key's own event list |
689 |
RTList<Event>::Iterator itNoteOnEventOnKeyList = itNoteOnEvent.moveToEndOf(pKey->pEvents); |
690 |
|
691 |
// allocate and trigger a new voice for the key |
692 |
LaunchVoice(itNoteOnEventOnKeyList, 0, false, true); |
693 |
} |
694 |
|
695 |
/** |
696 |
* Releases the voices on the given key if sustain pedal is not pressed. |
697 |
* If sustain is pressed, the release of the note will be postponed until |
698 |
* sustain pedal will be released or voice turned inactive by itself (e.g. |
699 |
* due to completion of sample playback). |
700 |
* |
701 |
* @param itNoteOffEvent - key, velocity and time stamp of the event |
702 |
*/ |
703 |
void Engine::ProcessNoteOff(Pool<Event>::Iterator& itNoteOffEvent) { |
704 |
midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOffEvent->Param.Note.Key]; |
705 |
|
706 |
pKey->KeyPressed = false; // the MIDI key was now released |
707 |
|
708 |
// release voices on this key if needed |
709 |
if (pKey->Active && !SustainPedal) { |
710 |
itNoteOffEvent->Type = Event::type_release; // transform event type |
711 |
} |
712 |
|
713 |
// move event to the key's own event list |
714 |
RTList<Event>::Iterator itNoteOffEventOnKeyList = itNoteOffEvent.moveToEndOf(pKey->pEvents); |
715 |
|
716 |
// spawn release triggered voice(s) if needed |
717 |
if (pKey->ReleaseTrigger) { |
718 |
LaunchVoice(itNoteOffEventOnKeyList, 0, true, false); //FIXME: for the moment we don't perform voice stealing for release triggered samples |
719 |
pKey->ReleaseTrigger = false; |
720 |
} |
721 |
} |
722 |
|
723 |
/** |
724 |
* Moves pitchbend event from the general (input) event list to the pitch |
725 |
* event list. |
726 |
* |
727 |
* @param itPitchbendEvent - absolute pitch value and time stamp of the event |
728 |
*/ |
729 |
void Engine::ProcessPitchbend(Pool<Event>::Iterator& itPitchbendEvent) { |
730 |
this->Pitch = itPitchbendEvent->Param.Pitch.Pitch; // store current pitch value |
731 |
itPitchbendEvent.moveToEndOf(pSynthesisEvents[Event::destination_vco]); |
732 |
} |
733 |
|
734 |
/** |
735 |
* Allocates and triggers a new voice. This method will usually be |
736 |
* called by the ProcessNoteOn() method and by the voices itself |
737 |
* (e.g. to spawn further voices on the same key for layered sounds). |
738 |
* |
739 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
740 |
* @param iLayer - layer index for the new voice (optional - only |
741 |
* in case of layered sounds of course) |
742 |
* @param ReleaseTriggerVoice - if new voice is a release triggered voice |
743 |
* (optional, default = false) |
744 |
* @param VoiceStealing - if voice stealing should be performed |
745 |
* when there is no free voice |
746 |
* (optional, default = true) |
747 |
* @returns pointer to new voice or NULL if there was no free voice or |
748 |
* if the voice wasn't triggered (for example when no region is |
749 |
* defined for the given key). |
750 |
*/ |
751 |
Pool<Voice>::Iterator Engine::LaunchVoice(Pool<Event>::Iterator& itNoteOnEvent, int iLayer, bool ReleaseTriggerVoice, bool VoiceStealing) { |
752 |
midi_key_info_t* pKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key]; |
753 |
|
754 |
// allocate a new voice for the key |
755 |
Pool<Voice>::Iterator itNewVoice = pKey->pActiveVoices->allocAppend(); |
756 |
if (itNewVoice) { |
757 |
// launch the new voice |
758 |
if (itNewVoice->Trigger(itNoteOnEvent, this->Pitch, this->pInstrument, iLayer, ReleaseTriggerVoice, VoiceStealing) < 0) { |
759 |
dmsg(4,("Voice not triggered\n")); |
760 |
pKey->pActiveVoices->free(itNewVoice); |
761 |
} |
762 |
else { // on success |
763 |
uint** ppKeyGroup = NULL; |
764 |
if (itNewVoice->KeyGroup) { // if this voice / key belongs to a key group |
765 |
ppKeyGroup = &ActiveKeyGroups[itNewVoice->KeyGroup]; |
766 |
if (*ppKeyGroup) { // if there's already an active key in that key group |
767 |
midi_key_info_t* pOtherKey = &pMIDIKeyInfo[**ppKeyGroup]; |
768 |
// kill all voices on the (other) key |
769 |
RTList<Voice>::Iterator itVoiceToBeKilled = pOtherKey->pActiveVoices->first(); |
770 |
RTList<Voice>::Iterator end = pOtherKey->pActiveVoices->end(); |
771 |
for (; itVoiceToBeKilled != end; ++itVoiceToBeKilled) { |
772 |
if (itVoiceToBeKilled->Type != Voice::type_release_trigger) itVoiceToBeKilled->Kill(itNoteOnEvent); |
773 |
} |
774 |
} |
775 |
} |
776 |
if (!pKey->Active) { // mark as active key |
777 |
pKey->Active = true; |
778 |
pKey->itSelf = pActiveKeys->allocAppend(); |
779 |
*pKey->itSelf = itNoteOnEvent->Param.Note.Key; |
780 |
} |
781 |
if (itNewVoice->KeyGroup) { |
782 |
*ppKeyGroup = &*pKey->itSelf; // put key as the (new) active key to its key group |
783 |
} |
784 |
if (itNewVoice->Type == Voice::type_release_trigger_required) pKey->ReleaseTrigger = true; // mark key for the need of release triggered voice(s) |
785 |
return itNewVoice; // success |
786 |
} |
787 |
} |
788 |
else if (VoiceStealing) { |
789 |
// first, get total amount of required voices (dependant on amount of layers) |
790 |
::gig::Region* pRegion = pInstrument->GetRegion(itNoteOnEvent->Param.Note.Key); |
791 |
if (!pRegion) return Pool<Voice>::Iterator(); // nothing defined for this MIDI key, so no voice needed |
792 |
int voicesRequired = pRegion->Layers; |
793 |
|
794 |
// now steal the (remaining) amount of voices |
795 |
for (int i = iLayer; i < voicesRequired; i++) |
796 |
StealVoice(itNoteOnEvent); |
797 |
|
798 |
// put note-on event into voice-stealing queue, so it will be reprocessed after killed voice died |
799 |
RTList<Event>::Iterator itStealEvent = pVoiceStealingQueue->allocAppend(); |
800 |
if (itStealEvent) { |
801 |
*itStealEvent = *itNoteOnEvent; // copy event |
802 |
itStealEvent->Param.Note.Layer = iLayer; |
803 |
itStealEvent->Param.Note.ReleaseTrigger = ReleaseTriggerVoice; |
804 |
} |
805 |
else dmsg(1,("Voice stealing queue full!\n")); |
806 |
} |
807 |
|
808 |
return Pool<Voice>::Iterator(); // no free voice or error |
809 |
} |
810 |
|
811 |
/** |
812 |
* Will be called by LaunchVoice() method in case there are no free |
813 |
* voices left. This method will select and kill one old voice for |
814 |
* voice stealing and postpone the note-on event until the selected |
815 |
* voice actually died. |
816 |
* |
817 |
* @param itNoteOnEvent - key, velocity and time stamp of the event |
818 |
*/ |
819 |
void Engine::StealVoice(Pool<Event>::Iterator& itNoteOnEvent) { |
820 |
if (!pEventPool->poolIsEmpty()) { |
821 |
|
822 |
RTList<uint>::Iterator iuiOldestKey; |
823 |
RTList<Voice>::Iterator itOldestVoice; |
824 |
|
825 |
// Select one voice for voice stealing |
826 |
switch (VOICE_STEAL_ALGORITHM) { |
827 |
|
828 |
// try to pick the oldest voice on the key where the new |
829 |
// voice should be spawned, if there is no voice on that |
830 |
// key, or no voice left to kill there, then procceed with |
831 |
// 'oldestkey' algorithm |
832 |
case voice_steal_algo_keymask: { |
833 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[itNoteOnEvent->Param.Note.Key]; |
834 |
if (itLastStolenVoice) { |
835 |
itOldestVoice = itLastStolenVoice; |
836 |
++itOldestVoice; |
837 |
} |
838 |
else { // no voice stolen in this audio fragment cycle yet |
839 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
840 |
} |
841 |
if (itOldestVoice) { |
842 |
iuiOldestKey = pOldestKey->itSelf; |
843 |
break; // selection succeeded |
844 |
} |
845 |
} // no break - intentional ! |
846 |
|
847 |
// try to pick the oldest voice on the oldest active key |
848 |
// (caution: must stay after 'keymask' algorithm !) |
849 |
case voice_steal_algo_oldestkey: { |
850 |
if (itLastStolenVoice) { |
851 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiLastStolenKey]; |
852 |
itOldestVoice = itLastStolenVoice; |
853 |
++itOldestVoice; |
854 |
if (!itOldestVoice) { |
855 |
iuiOldestKey = iuiLastStolenKey; |
856 |
++iuiOldestKey; |
857 |
if (iuiOldestKey) { |
858 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiOldestKey]; |
859 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
860 |
} |
861 |
else { |
862 |
dmsg(1,("gig::Engine: Warning, too less voices, even for voice stealing! - Better recompile with higher MAX_AUDIO_VOICES.\n")); |
863 |
return; |
864 |
} |
865 |
} |
866 |
else iuiOldestKey = iuiLastStolenKey; |
867 |
} |
868 |
else { // no voice stolen in this audio fragment cycle yet |
869 |
iuiOldestKey = pActiveKeys->first(); |
870 |
midi_key_info_t* pOldestKey = &pMIDIKeyInfo[*iuiOldestKey]; |
871 |
itOldestVoice = pOldestKey->pActiveVoices->first(); |
872 |
} |
873 |
break; |
874 |
} |
875 |
|
876 |
// don't steal anything |
877 |
case voice_steal_algo_none: |
878 |
default: { |
879 |
dmsg(1,("No free voice (voice stealing disabled)!\n")); |
880 |
return; |
881 |
} |
882 |
} |
883 |
|
884 |
//FIXME: can be removed, just a sanity check for debugging |
885 |
if (!itOldestVoice->IsActive()) dmsg(1,("gig::Engine: ERROR, tried to steal a voice which was not active !!!\n")); |
886 |
|
887 |
// now kill the selected voice |
888 |
itOldestVoice->Kill(itNoteOnEvent); |
889 |
// remember which voice on which key we stole, so we can simply proceed for the next voice stealing |
890 |
this->itLastStolenVoice = itOldestVoice; |
891 |
this->iuiLastStolenKey = iuiOldestKey; |
892 |
} |
893 |
else dmsg(1,("Event pool emtpy!\n")); |
894 |
} |
895 |
|
896 |
/** |
897 |
* Removes the given voice from the MIDI key's list of active voices. |
898 |
* This method will be called when a voice went inactive, e.g. because |
899 |
* it finished to playback its sample, finished its release stage or |
900 |
* just was killed. |
901 |
* |
902 |
* @param itVoice - points to the voice to be freed |
903 |
*/ |
904 |
void Engine::FreeVoice(Pool<Voice>::Iterator& itVoice) { |
905 |
if (itVoice) { |
906 |
midi_key_info_t* pKey = &pMIDIKeyInfo[itVoice->MIDIKey]; |
907 |
|
908 |
uint keygroup = itVoice->KeyGroup; |
909 |
|
910 |
// free the voice object |
911 |
pVoicePool->free(itVoice); |
912 |
|
913 |
// if no other voices left and member of a key group, remove from key group |
914 |
if (pKey->pActiveVoices->isEmpty() && keygroup) { |
915 |
uint** ppKeyGroup = &ActiveKeyGroups[keygroup]; |
916 |
if (*ppKeyGroup == &*pKey->itSelf) *ppKeyGroup = NULL; // remove key from key group |
917 |
} |
918 |
} |
919 |
else std::cerr << "Couldn't release voice! (!itVoice)\n" << std::flush; |
920 |
} |
921 |
|
922 |
/** |
923 |
* Called when there's no more voice left on a key, this call will |
924 |
* update the key info respectively. |
925 |
* |
926 |
* @param pKey - key which is now inactive |
927 |
*/ |
928 |
void Engine::FreeKey(midi_key_info_t* pKey) { |
929 |
if (pKey->pActiveVoices->isEmpty()) { |
930 |
pKey->Active = false; |
931 |
pActiveKeys->free(pKey->itSelf); // remove key from list of active keys |
932 |
pKey->itSelf = RTList<uint>::Iterator(); |
933 |
pKey->ReleaseTrigger = false; |
934 |
pKey->pEvents->clear(); |
935 |
dmsg(3,("Key has no more voices now\n")); |
936 |
} |
937 |
else dmsg(1,("gig::Engine: Oops, tried to free a key which contains voices.\n")); |
938 |
} |
939 |
|
940 |
/** |
941 |
* Reacts on supported control change commands (e.g. pitch bend wheel, |
942 |
* modulation wheel, aftertouch). |
943 |
* |
944 |
* @param itControlChangeEvent - controller, value and time stamp of the event |
945 |
*/ |
946 |
void Engine::ProcessControlChange(Pool<Event>::Iterator& itControlChangeEvent) { |
947 |
dmsg(4,("Engine::ContinuousController cc=%d v=%d\n", itControlChangeEvent->Param.CC.Controller, itControlChangeEvent->Param.CC.Value)); |
948 |
|
949 |
switch (itControlChangeEvent->Param.CC.Controller) { |
950 |
case 64: { |
951 |
if (itControlChangeEvent->Param.CC.Value >= 64 && !SustainPedal) { |
952 |
dmsg(4,("PEDAL DOWN\n")); |
953 |
SustainPedal = true; |
954 |
|
955 |
// cancel release process of voices if necessary |
956 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
957 |
if (iuiKey) { |
958 |
itControlChangeEvent->Type = Event::type_cancel_release; // transform event type |
959 |
while (iuiKey) { |
960 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
961 |
++iuiKey; |
962 |
if (!pKey->KeyPressed) { |
963 |
RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend(); |
964 |
if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list |
965 |
else dmsg(1,("Event pool emtpy!\n")); |
966 |
} |
967 |
} |
968 |
} |
969 |
} |
970 |
if (itControlChangeEvent->Param.CC.Value < 64 && SustainPedal) { |
971 |
dmsg(4,("PEDAL UP\n")); |
972 |
SustainPedal = false; |
973 |
|
974 |
// release voices if their respective key is not pressed |
975 |
RTList<uint>::Iterator iuiKey = pActiveKeys->first(); |
976 |
if (iuiKey) { |
977 |
itControlChangeEvent->Type = Event::type_release; // transform event type |
978 |
while (iuiKey) { |
979 |
midi_key_info_t* pKey = &pMIDIKeyInfo[*iuiKey]; |
980 |
++iuiKey; |
981 |
if (!pKey->KeyPressed) { |
982 |
RTList<Event>::Iterator itNewEvent = pKey->pEvents->allocAppend(); |
983 |
if (itNewEvent) *itNewEvent = *itControlChangeEvent; // copy event to the key's own event list |
984 |
else dmsg(1,("Event pool emtpy!\n")); |
985 |
} |
986 |
} |
987 |
} |
988 |
} |
989 |
break; |
990 |
} |
991 |
} |
992 |
|
993 |
// update controller value in the engine's controller table |
994 |
ControllerTable[itControlChangeEvent->Param.CC.Controller] = itControlChangeEvent->Param.CC.Value; |
995 |
|
996 |
// move event from the unsorted event list to the control change event list |
997 |
itControlChangeEvent.moveToEndOf(pCCEvents); |
998 |
} |
999 |
|
1000 |
/** |
1001 |
* Reacts on MIDI system exclusive messages. |
1002 |
* |
1003 |
* @param itSysexEvent - sysex data size and time stamp of the sysex event |
1004 |
*/ |
1005 |
void Engine::ProcessSysex(Pool<Event>::Iterator& itSysexEvent) { |
1006 |
RingBuffer<uint8_t>::NonVolatileReader reader = pSysexBuffer->get_non_volatile_reader(); |
1007 |
|
1008 |
uint8_t exclusive_status, id; |
1009 |
if (!reader.pop(&exclusive_status)) goto free_sysex_data; |
1010 |
if (!reader.pop(&id)) goto free_sysex_data; |
1011 |
if (exclusive_status != 0xF0) goto free_sysex_data; |
1012 |
|
1013 |
switch (id) { |
1014 |
case 0x41: { // Roland |
1015 |
uint8_t device_id, model_id, cmd_id; |
1016 |
if (!reader.pop(&device_id)) goto free_sysex_data; |
1017 |
if (!reader.pop(&model_id)) goto free_sysex_data; |
1018 |
if (!reader.pop(&cmd_id)) goto free_sysex_data; |
1019 |
if (model_id != 0x42 /*GS*/) goto free_sysex_data; |
1020 |
if (cmd_id != 0x12 /*DT1*/) goto free_sysex_data; |
1021 |
|
1022 |
// command address |
1023 |
uint8_t addr[3]; // 2 byte addr MSB, followed by 1 byte addr LSB) |
1024 |
const RingBuffer<uint8_t>::NonVolatileReader checksum_reader = reader; // so we can calculate the check sum later |
1025 |
if (reader.read(&addr[0], 3) != 3) goto free_sysex_data; |
1026 |
if (addr[0] == 0x40 && addr[1] == 0x00) { // System Parameters |
1027 |
} |
1028 |
else if (addr[0] == 0x40 && addr[1] == 0x01) { // Common Parameters |
1029 |
} |
1030 |
else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x10) { // Part Parameters (1) |
1031 |
switch (addr[3]) { |
1032 |
case 0x40: { // scale tuning |
1033 |
uint8_t scale_tunes[12]; // detuning of all 12 semitones of an octave |
1034 |
if (reader.read(&scale_tunes[0], 12) != 12) goto free_sysex_data; |
1035 |
uint8_t checksum; |
1036 |
if (!reader.pop(&checksum)) goto free_sysex_data; |
1037 |
if (GSCheckSum(checksum_reader, 12) != checksum) goto free_sysex_data; |
1038 |
for (int i = 0; i < 12; i++) scale_tunes[i] -= 64; |
1039 |
AdjustScale((int8_t*) scale_tunes); |
1040 |
break; |
1041 |
} |
1042 |
} |
1043 |
} |
1044 |
else if (addr[0] == 0x40 && (addr[1] & 0xf0) == 0x20) { // Part Parameters (2) |
1045 |
} |
1046 |
else if (addr[0] == 0x41) { // Drum Setup Parameters |
1047 |
} |
1048 |
break; |
1049 |
} |
1050 |
} |
1051 |
|
1052 |
free_sysex_data: // finally free sysex data |
1053 |
pSysexBuffer->increment_read_ptr(itSysexEvent->Param.Sysex.Size); |
1054 |
} |
1055 |
|
1056 |
/** |
1057 |
* Calculates the Roland GS sysex check sum. |
1058 |
* |
1059 |
* @param AddrReader - reader which currently points to the first GS |
1060 |
* command address byte of the GS sysex message in |
1061 |
* question |
1062 |
* @param DataSize - size of the GS message data (in bytes) |
1063 |
*/ |
1064 |
uint8_t Engine::GSCheckSum(const RingBuffer<uint8_t>::NonVolatileReader AddrReader, uint DataSize) { |
1065 |
RingBuffer<uint8_t>::NonVolatileReader reader = AddrReader; |
1066 |
uint bytes = 3 /*addr*/ + DataSize; |
1067 |
uint8_t addr_and_data[bytes]; |
1068 |
reader.read(&addr_and_data[0], bytes); |
1069 |
uint8_t sum = 0; |
1070 |
for (uint i = 0; i < bytes; i++) sum += addr_and_data[i]; |
1071 |
return 128 - sum % 128; |
1072 |
} |
1073 |
|
1074 |
/** |
1075 |
* Allows to tune each of the twelve semitones of an octave. |
1076 |
* |
1077 |
* @param ScaleTunes - detuning of all twelve semitones (in cents) |
1078 |
*/ |
1079 |
void Engine::AdjustScale(int8_t ScaleTunes[12]) { |
1080 |
memcpy(&this->ScaleTuning[0], &ScaleTunes[0], 12); //TODO: currently not sample accurate |
1081 |
} |
1082 |
|
1083 |
/** |
1084 |
* Initialize the parameter sequence for the modulation destination given by |
1085 |
* by 'dst' with the constant value given by val. |
1086 |
*/ |
1087 |
void Engine::ResetSynthesisParameters(Event::destination_t dst, float val) { |
1088 |
int maxsamples = pAudioOutputDevice->MaxSamplesPerCycle(); |
1089 |
float* m = &pSynthesisParameters[dst][0]; |
1090 |
for (int i = 0; i < maxsamples; i += 4) { |
1091 |
m[i] = val; |
1092 |
m[i+1] = val; |
1093 |
m[i+2] = val; |
1094 |
m[i+3] = val; |
1095 |
} |
1096 |
} |
1097 |
|
1098 |
float Engine::Volume() { |
1099 |
return GlobalVolume; |
1100 |
} |
1101 |
|
1102 |
void Engine::Volume(float f) { |
1103 |
GlobalVolume = f; |
1104 |
} |
1105 |
|
1106 |
uint Engine::Channels() { |
1107 |
return 2; |
1108 |
} |
1109 |
|
1110 |
void Engine::SetOutputChannel(uint EngineAudioChannel, uint AudioDeviceChannel) { |
1111 |
AudioChannel* pChannel = pAudioOutputDevice->Channel(AudioDeviceChannel); |
1112 |
if (!pChannel) throw AudioOutputException("Invalid audio output device channel " + ToString(AudioDeviceChannel)); |
1113 |
switch (EngineAudioChannel) { |
1114 |
case 0: // left output channel |
1115 |
pOutputLeft = pChannel->Buffer(); |
1116 |
AudioDeviceChannelLeft = AudioDeviceChannel; |
1117 |
break; |
1118 |
case 1: // right output channel |
1119 |
pOutputRight = pChannel->Buffer(); |
1120 |
AudioDeviceChannelRight = AudioDeviceChannel; |
1121 |
break; |
1122 |
default: |
1123 |
throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel)); |
1124 |
} |
1125 |
} |
1126 |
|
1127 |
int Engine::OutputChannel(uint EngineAudioChannel) { |
1128 |
switch (EngineAudioChannel) { |
1129 |
case 0: // left channel |
1130 |
return AudioDeviceChannelLeft; |
1131 |
case 1: // right channel |
1132 |
return AudioDeviceChannelRight; |
1133 |
default: |
1134 |
throw AudioOutputException("Invalid engine audio channel " + ToString(EngineAudioChannel)); |
1135 |
} |
1136 |
} |
1137 |
|
1138 |
uint Engine::VoiceCount() { |
1139 |
return ActiveVoiceCount; |
1140 |
} |
1141 |
|
1142 |
uint Engine::VoiceCountMax() { |
1143 |
return ActiveVoiceCountMax; |
1144 |
} |
1145 |
|
1146 |
bool Engine::DiskStreamSupported() { |
1147 |
return true; |
1148 |
} |
1149 |
|
1150 |
uint Engine::DiskStreamCount() { |
1151 |
return (pDiskThread) ? pDiskThread->ActiveStreamCount : 0; |
1152 |
} |
1153 |
|
1154 |
uint Engine::DiskStreamCountMax() { |
1155 |
return (pDiskThread) ? pDiskThread->ActiveStreamCountMax : 0; |
1156 |
} |
1157 |
|
1158 |
String Engine::DiskStreamBufferFillBytes() { |
1159 |
return pDiskThread->GetBufferFillBytes(); |
1160 |
} |
1161 |
|
1162 |
String Engine::DiskStreamBufferFillPercentage() { |
1163 |
return pDiskThread->GetBufferFillPercentage(); |
1164 |
} |
1165 |
|
1166 |
String Engine::EngineName() { |
1167 |
return "GigEngine"; |
1168 |
} |
1169 |
|
1170 |
String Engine::InstrumentFileName() { |
1171 |
return InstrumentFile; |
1172 |
} |
1173 |
|
1174 |
int Engine::InstrumentIndex() { |
1175 |
return InstrumentIdx; |
1176 |
} |
1177 |
|
1178 |
int Engine::InstrumentStatus() { |
1179 |
return InstrumentStat; |
1180 |
} |
1181 |
|
1182 |
String Engine::Description() { |
1183 |
return "Gigasampler Engine"; |
1184 |
} |
1185 |
|
1186 |
String Engine::Version() { |
1187 |
String s = "$Revision: 1.22 $"; |
1188 |
return s.substr(11, s.size() - 13); // cut dollar signs, spaces and CVS macro keyword |
1189 |
} |
1190 |
|
1191 |
}} // namespace LinuxSampler::gig |